參數(shù)資料
型號: MC68HC705L16CFU
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PQFP80
封裝: PLASTIC, QFP-80
文件頁數(shù): 96/146頁
文件大?。?/td> 852K
代理商: MC68HC705L16CFU
Port B
MC68HC05L16 MC68HC705L16 Data Sheet, Rev. 4.1
Freescale Semiconductor
53
DDRAx — Port A Data Direction Register Bit x
0 = Configure I/O pin PAx to input
1 = Configure I/O pin PAx to output
6.3 Port B
Port B pins serve two basic functions: KWI input pins and general-purpose input pins.
Each KWI input is enabled or disabled by the corresponding KWIEx bit in the KWIEN register, and the
usage of the KWI input does not affect the general-purpose input function.
Port B pin states may be read any time regardless of the configurations. Since there is no output drive
logic associated with port B, there is no DDRB register and the write to the PORTB register has no
meaning.
Port B has optional pullup resistors. When the RBH or RBL bit in the RCR1 is set, pullup resistors are
attached to the upper four bits or lower four bits of port A pins, respectively.
Read
Anytime; returns pin level
Write
Has no meaning or effect
Reset
Unaffected; always an input port
6.4 Port C
Port C pins share functions with several on-chip peripherals. A pin function is controlled by the enable bit
of each associated peripheral.
Bit 7 and bit 6 of port C are general-purpose I/O pins and IRQ input pins. The DDRC7 and DDRC6 bits
determine whether the pin states or the data latch states should be read by the CPU. Since IRQ1F or
IRQ2F can be set by either the pins or the data latches, when using IRQs, be sure to clear the flags by
software before enabling the IRQ1E or IRQ2E bits.
When configured for output port, PC6 and PC7 are open drain only. When VDD output is required, a pullup
resistor must be enabled.
The PC5 pin is a general-purpose I/O pin and the direction of the pin is determined by the DDRC5 bit in
the data direction register C (DDRC). When the event output (EVO) is enabled, the PC5 is configured as
an event output pin and the DDRC5 bit has meaning only for the read of PC5 bit in the PORTC register;
if the DDRC5 is set, the PC5 data latch is read by the CPU. Otherwise, PC5 pin level (EVO state) is read.
When EVO is disabled, the DDRC5 bit decides the idling state of EVO (if DDRC5 = 1).
Address:
$0001
Bit 7
654321
Bit 0
Read:
PB7
PB6
PB5
PB4
PB3
PB2
PB1
PB0
Write:
Reset:
Unaffected by reset
Figure 6-4. Port B Data Register (PORTB)
相關(guān)PDF資料
PDF描述
MC68HC05L16CFU 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQFP80
MC68HC705P9CDWR2 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDSO28
MC68HC705V12CFNR2 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PQCC68
MC68HC708AS48CFN 8-BIT, EEPROM, 8.4 MHz, MICROCONTROLLER, PQCC52
MC68HC711D3FNR2 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PQCC44
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC68HC705L32FU 制造商:Rochester Electronics LLC 功能描述: 制造商:Freescale Semiconductor 功能描述:
MC68HC705L5FUE 功能描述:8位微控制器 -MCU 705L5-EPP-80QFP-6019 RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
MC68HC705MC4CDW 制造商:Motorola 功能描述:MOTOROLA S7D9B
MC68HC705P6ACDW 功能描述:8位微控制器 -MCU 8 Bit 2.1MHz RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
MC68HC705P6ACP 功能描述:IC MCU 2.1MHZ 4.5K OTP 28-DIP RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器, 系列:HC05 其它有關(guān)文件:STM32F101T8 View All Specifications 特色產(chǎn)品:STM32 32-bit Cortex MCUs 標(biāo)準(zhǔn)包裝:490 系列:STM32 F1 核心處理器:ARM? Cortex?-M3 芯體尺寸:32-位 速度:36MHz 連通性:I²C,IrDA,LIN,SPI,UART/USART 外圍設(shè)備:DMA,PDR,POR,PVD,PWM,溫度傳感器,WDT 輸入/輸出數(shù):26 程序存儲器容量:64KB(64K x 8) 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:10K x 8 電壓 - 電源 (Vcc/Vdd):2 V ~ 3.6 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 10x12b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:36-VFQFN,36-VFQFPN 包裝:托盤 配用:497-10030-ND - STARTER KIT FOR STM32497-8853-ND - BOARD DEMO STM32 UNIV USB-UUSCIKSDKSTM32-PL-ND - KIT IAR KICKSTART STM32 CORTEXM3497-8512-ND - KIT STARTER FOR STM32F10XE MCU497-8505-ND - KIT STARTER FOR STM32F10XE MCU497-8304-ND - KIT STM32 MOTOR DRIVER BLDC497-6438-ND - BOARD EVALUTION FOR STM32 512K497-6289-ND - KIT PERFORMANCE STICK FOR STM32MCBSTM32UME-ND - BOARD EVAL MCBSTM32 + ULINK-MEMCBSTM32U-ND - BOARD EVAL MCBSTM32 + ULINK2更多... 其它名稱:497-9032STM32F101T8U6-ND